Hello there,
Your correct answer would be "remain still".
The reason why I say this is because when muscles are contracted, this mean's that they are not constantly exercising. This would be that they would stay the same.
Hope this helps.
~Jurgen
Deficiency disease + A
Niacin (B3) deficiency + D
Vitamin A deficiency + B
Vitamin B1 deficiency + C
Vitamin D deficiency + E
Vitamin C deficiency + F
Hope i helped
Https://www.mayoclinic.org/healthy-lifestyle/fitness/in-depth/fitness/art-20048269